Braking device.



G. D. HOWARD.

BRAKING DEVICE. APPLICATION ILED JAN. 2, 1912.

Patented Nov. 12, 1912.

Z SHEETS-SHEET 2.

I v W W GEORGE D. HQWARD, OI RUFF-IN, NORTH CAROLINA.

' BRAKING DEVICE.

Specincaticn of Letters Patent.

Patented Nov. 12,1912.

Application met January 2 19112. Serial No. 668,967.

To all whom it 'may concern:

Be it known that. I, GEORGE D. HOWARD, a citizen of the United States, residing at Run, in the county of Rockingham, State of North Carolina, have invented certain.

new and useful' Improvements `in Braking Devices; and I do hereby declare the following to be a full', clear, and exact description of theinvention, such as will enable others skilled in the art to which it appertans to make and use the same.

This invention relates to braking Adevices and particularly to that type adapted 'for association with air brake systems on railroad cars to automatically effect t-he actuation of the air brakes under predetermined conditions.

The object of the invention resides in the provision of a device of the character referred to suitably connected with thc'alr brake mechanism and adapted to apply the brake in the event of a hot box soas to'warn the trainmen and prevent the breaking of or injury to the hot journal.

A further object of the invention resides in the provision of a device of the character named which is adaptedto automatically apply the air brakes in case of derailment of a car or cars in a given train.

With the above and other objects in view, theinvention consists in the details of con; struction and in the arrangement and combination of parts to be hereinafter more fully described and particularly pointed outl in the appended claim.

In describing theinvention in detail, reference will be had to the accompanying drawings wherein like characters of reference denote correspondin parts in the several views, and in whic Figure 1 is a side elevation of a truck showing the invention applied, Fig. 2, a plan view of what is shown in Fig. 1, Fig. 3, an enlarged section on the-line 3 3 of Fig. l, Fig. 4, a sectionon the line 4-4 of Fig. 3, Fig. 5, a section on the line 5 5 of Fig. 3, Fig. 6, a section on the line 6 6 of Fig. 3, Fig. 7, a view similar to Fig. 6 showing the position of the parts of case of derailment., and Fig. 8, a. detail perspective View of the device applied to a journal box.

Referring to the drawings, A indicates generally the truck which includes a frame 10,- axles 11, journal bearing 12 for said axle, and a journal box 13 surrounding each the device in known construction.

journal bearing all of which are of a `.vell

The train pipe of the air brake Amechanism is indicated at 14. and is provided adjacent each axle 11 with laterally directed branch pipes 15. Mounted upon the sides of each journal box 13 is a vertical pipe member 16 theupper end of which is provided with a fusible plug 17, while the intermediate portion thereof connects 'with a branch pipe 15' at 18. The lower en d of the pipe member 16 is provided with a laterally directed internally threaded enlarged portion 19 which is also secured to the adjacent side of the box 13. Threaded in the portion 19 isa valve seat 20 in which is rotatably mounted a tapered valve 21, the major end of which latter is disposed toward the pipe member 16, while the minor end is provlded with a stem 22 to which'is secured an operating lever 23. The valve 21 is provided with a pair of openings 24 and 25 which are out of registration with openings 26 and 27 in the enlarged port-ion 19v when t-he lever 23 is disposed vertically. It will of course be understood that the valve seat 20 is also provided with openings which const-antly register with the openings 26 and27.

-portion 19, While the movement of said lever a sufficient distance in the opposite direction will bring the opening 25 lnto registration with the opening 27. This movement 'of the lever 23 is adapted to take place upon derailment of the car, said lever being then brought in contact with the ground or with some object beside the car, as the movement of the lever 23 in either direction will serve to open the pipe member 16 to the atmosphere it will be apparent that it is immaterial to the proper functioning of the lever in what direction the car is moving. The

upper end of the lever 23 is provided with a detent 29 which is engaged by `a spring pin supported upon the box 13. This pin serves to hold thelever against movement as they result of jarring or other causes but will readily yield to permit movement of the lever in case of derailment.

It will thus be apparent that the device previously described will Kautomatically set the brakes in case of either a hot box or of derailment. In the rst instance the heat from the hot boli will meltthe fusible plug '17 and result inthe air in the train pipe rotate the valve 21 so as to bring either the opening 24 into registration with the opening 26 or the opening 25 into registration .with the opening 27 which will also result in the exhaustion of the air from the train pipe 14 and the application of the brake.

What is claimed 1s: y

In a valve adapted to. be applied to a `ear truck and to be connected with an air brake, an air pipe having a cylindrical valve casing communicating there# with, said, valve casing having radial apertures communicating with the outer air, a valve 'seat secured in the casin and havingradial apertures' registering with the apertures. of the casing, a valve member rotatably fitted in the valve seat and eing axially alined with the air pipe and ha g a rtures normally out of registration 'th e adjacent apertures of the valve sea a normally vertical and depending lever secured on the valve member and ada ted to be moved in either. of two alternatlve directions and to bring either of the apertures of the valve member into registration with the adjacent aperture of the valve seat for establishing communication between the air pipe and the outer air.

In testimony whereof, I aix my signature, inv presence of two witnesses.

GEORGE D. HOWARD.

Witnesses:

Lns'rnn A. SCBINN, EDWARD T. BUnGEss. 

